4242044404021 has 4 divisors (see below), whose sum is σ = 4280962242700. Its totient is φ = 4203126565344.

The previous prime is 4242044403977. The next prime is 4242044404063. The reversal of 4242044404021 is 1204044402424.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3300620531121 + 941423872900 = 1816761^2 + 970270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4242044404021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4242044404621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19458919176 + ... + 19458919393.

It is an arithmetic number, because the mean of its divisors is an integer number (1070240560675).

Almost surely, 2^{4242044404021} is an apocalyptic number.

It is an amenable number.

4242044404021 is a deficient number, since it is larger than the sum of its proper divisors (38917838679).

4242044404021 is a wasteful number, since it uses less digits than its factorization.

4242044404021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38917838678.

The product of its (nonzero) digits is 32768, while the sum is 31.

Adding to 4242044404021 its reverse (1204044402424), we get a palindrome (5446088806445).

The spelling of 4242044404021 in words is "four trillion, two hundred forty-two billion, forty-four million, four hundred four thousand, twenty-one".